01 -
Evenly spread mustard over each beef slice.
02 -
Place bacon, chopped onion, and pickles on top of the mustard-coated beef.
03 -
Roll each beef slice tightly and secure with kitchen twine or toothpicks.
04 -
Season rouladen with salt and pepper, then brown them in heated vegetable oil over medium heat until evenly seared.
05 -
Pour beef broth over browned rouladen, reduce heat, cover, and simmer gently for approximately 120 minutes until meat is tender.
06 -
Remove rouladen, thicken the cooking liquid with flour dissolved in a small amount of water, simmer until sauce thickens, then serve.